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    SSD | Bone conduction device


    Audiological aspectAudiological aspect   Medical aspect  Medical aspect    User's report User's report

    Benefits

    Statement

    Literature

    Audiological aspect Effective against headshaddow (up to conversational level)

    "Speech audiometry showed a significant head shadow benefit with both implantable bone conduction devices." (Desmet et al. 2012)

    More: Van de Heyning et al. 2016, Hol et al. 2010, Mertens et al. 2018


    Audiological aspect Better speech understanding

    "Bone-anchored hearing aid systems transmit sound to the better side by bone conduction (BC). (…) Several studies have shown significant speech understanding improvement and improvement of quality of life for SSD." (Laske et al. 2015)

    More: Mertens et al. 2018, Snapp et al. 2019, Salcher et al.
    2017, Van de Heyning et al. 2016, Yuen et al. 2009, Lin et al.
    2006


    Audiological aspect Better WRS

    "The median WRS at 65 dB SPL increased significantly from 0 to 80% (mean: 8% versus 84%)." (Salcher et al. 2017)

    More: Siegert et al. 2013


    Audiological aspect Subjective benefit

    "Bone-anchored hearing aid systems transmit sound to the better side by bone conduction (BC). (…) Several studies have shown significant speech understanding improvement and improvement of quality of life for SSD." (Laske et al. 2015)

    "Nearly all patients experienced a subjective benefit in all hearing situations assessed with the BBSS (9/10). There was a significant improvement in the categories speech in quiet, distant speaker, reverberant room, and overall." (Salcher et al. 2017)

    More: Van de Heyning et al. 2016, Boleas-Aguirre et al. 2012, Desmet et al. 2014, Oeding et al. 2013, Peters et al. 2015, Gerdes et al. 2014, Jung et al. 2019

    User's report No need to close the good ear / good ear stays free

    "A CROS conducts signals from the hearing field of the poor ear via a wire (or FM/Bluetooth) to a microphone in the ear canal of the better ear. (...) A [bone conduction device] transfers signals from the hearing field of the poor side to the better hearing ear by vibration of the bone of the skull." (Peters et al. 2014)

    More: Hol et al. 2005

    User's report Easy pre-OP testing

    "A trial with a [bone conduction device] can be performed by attaching the [bone conduction device] to a tight headband." (Peters et al. 2015)

    More: Spielman et al. 2018, Mertens et al. 2016, Desmet et al. 2012, Hol et al. 2010, Kompis et al. 2011, Wendrich et al. 2017, Rainsbury et al. 2016

    User's report Improvement of schoolastic performance

    In children, a fairly rapid hearing rehabilitation period is important since they may, after a fairly short time, lag behind in school or in development since they frequently cannot follow classroom activities or social interactions (conclusion / Tomlin et al. 2014)

    More: Mertens et al. 2018, Urik et al. 2019, Bovo et al. 1988


     

    Drawbacks

    Statement

    Literature


    Audiological aspect No binaural hearing

    "The CROS and bone-anchored hearing aid treatment [...] do not allow for real binaural hearing because the brain only receives and processes auditory input from one side." (Arndt et al. 2011)
    "Theoretically, CROSS and BCD can alleviate the head shadow effect and thus improve speech perception in noise and sound localization, and they also may have a beneficial influence on quality of life. However, both modalities do not restore binaural hearing." (Peters et al. 2014)
    More: Agterberg et al. 2019, Battista et al. 2013, Hol et al. 2005, 2010, Hobson et al. 2010, Snapp et al. 2019


    Audiological aspect No localisation, but lateralisation

    "Sound-localization performance of patients with single-sided deafness is not improved when listening with a bone-conduction device." Agterberg et al. 2019


    Audiological aspect No benefit for tinnitus

    "However, for people with severe to profound sensorineural hearing loss, hearing aids and other forms of sound enrichment are not useful for tinnitus treatment. In recent years, patients with severe to profound hearing loss have sought cochlear implantation as a means of tinnitus relief when other treatments were found to be ineffective." (Holder et al. 2017)

    Audiological aspect
    Noise on HA side can decrease benefit in good ear

    "[speech reception thresholds] were also impaired significantly by both [air conduction and bone conduction rerouting] device types when noise was presented toward the impaired ear." (Kitterick et al. 2016)

    More: Arndt et al. 2011, 2017, Snapp et al. 2017, Finbow et al. 2015, Peter et al. 2019


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